Mitsubishi Montero (2004+). Manual — part 624

REAR HEATER UNIT

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-139

INSPECTION

M1554010700026

.

BLOWER MOTOR CHECK
When battery voltage is applied between the terminals, check
that the motor operates. Also, check that there is no abnormal
noise.

.

RESISTOR CHECK
Use an ohmmeter to measure the resistance between the ter-
minals. Check that the measured value is at the standard
value.

AC001038 AB

TESTER CONNECTION

STANDARD VALUE

Ω

1

− 6

4.9

± 0.343

1

− 3

1.25

± 0.0875

AC001039AB

COMPRESSOR ASSEMBLY

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-140

COMPRESSOR ASSEMBLY

REMOVAL AND INSTALLATION

M1552004400150

Pre-removal Operation
Refrigerant discharging (Refer to

P.55A-113

).

Post-installation Operation
• Refrigerant charging (Refer to

P.55A-113

).

• Drive Belt Tension Adjustment (Refer to GROUP 00,

Maintenance Service

− Drive Belts

P.00-41

).

AC001052

1

2

3

5

6

N

4

9.8 ± 2 N·m
87 ± 17 in-lb

REMOVAL STEPS

<<A>>

1.

DRIVE BELT

<<B>>

2.

DISCHARGE HOSE

<<B>>

3.

SUCTION HOSE

4.

O-RING

<<C>>

>>A<<

5.

COMPRESSOR

6.

COMPRESSOR BRACKET

REMOVAL STEPS (Continued)

COMPRESSOR ASSEMBLY

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-141

REMOVAL SERVICE POINTS

.

<<A>> DRIVE BELT REMOVAL

CAUTION

When reusing the drive belt, mark an arrow which indi-
cates the turning direction (right turn) on the back of the
drive belt with a chalk, etc.
Insert the socket-wrench handle into the tool hole for auto-ten-
sioner and turn it to the arrow direction. Reduce the drive belt
tension and remove the drive belt.

.

<<B>> DISCHARGE HOSE/SUCTION HOSE REMOVAL

CAUTION

Seal the hoses completely, otherwise the compressor oil
and receiver will absorb water vapor easily, possibly dam-
aging the compressor and deteriorating performance.
Plug the disconnected hose and compressor nipple to prevent
foreign matter from getting into them.

.

<<C>> COMPRESSOR REMOVAL
When removing the compressor, be careful not to spill the com-
pressor oil.

INSTALLATION SERVICE POINT

.

>>A<< COMPRESSOR INSTALLATION
If a new compressor is installed, first adjust the amount of oil
according to the procedures described below, and then install
the compressor.
1. Measure the amount [X cm

3

(X floz)] of oil within the

removed compressor.

2. Drain (from the new compressor) the amount [Y cm

3

(Y

floz)] of oil calculated according to the following formula, and
then install the new compressor.

<Vehicles without rear cooler or rear A/C>
New compressor oil amount = 120cm

3

(4.2 floz)

<Vehicles with rear cooler or rear A/C>
New compressor oil amount = 140cm

3

(4.9 floz)

<Vehicles without rear cooler or rear A/C>
120 cm

3

− X cm

3

= Y cm

3

(4.2 floz

− X floz = Y floz)

<Vehicles with rear cooler or rear A/C>
140 cm

3

− X cm

3

= Y cm

3

(4.9 floz

− X floz = Y floz)

NOTE: Y cm

3

(Y floz) indicates the amount of oil in the refriger-

ant line, the condenser, the evaporator, etc.
NOTE: When replacing the following parts at the same times as
the compressor, subtract the rated oil amount of the each part
from Y cm

3

(Y floz) and discharge from the new compressor.

Quantity:

• Evaporator: 60 cm

3

(2.0 floz)

• Condenser: 15 cm

3

(0.5 floz)

ACX00838 AC

COMPRESSOR ASSEMBLY

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-142

• Suction hose: 10 cm

3

(0.3 floz)

• Receiver: 10 cm

3

(0.3 floz)

INSPECTION

M1552004500191

AIR CONDITIONING COMPRESSOR CLUTCH
OPERATION INSPECTION

Connect the positive battery terminal to the air conditioning
compressor clutch connector terminal 3, and ground the nega-
tive battery terminal to the body of the compressor. The condi-
tion is normal if the sound of the a/c compressor clutch (click)
can be heard.

COMPRESSOR

M1552004600284

DISASSEMBLY AND ASSEMBLY

ACX01440AB

AC002662

1

2

3

4

5

6

7

14 ± 3 N·m
120 ± 24 in-lb

AB

DISASSEMBLY STEPS

>>C<<

•

AIR GAP ADJUSTMENT

1. LOCK SENSOR

<<A>>

2. ARMATURE PLATE

>>B<<

3. SNAP RING

4. ROTOR
5. SNAP RING

>>A<<

6. CLUTCH COIL
7. SHIMS

DISASSEMBLY STEPS